Swift Tactical Series STR1001M, 30mm Medium Scope Mounting Rings with 1" Metal Inserts, Weaver Compatible, Matte Black These Tactical Rings are Longer then Normal, Mounting Clearance will Vary Provides a Medium .5" / 12.7mm Mounting Height Constructed from Durable, Lightweight Aluminum Holding Strength Enhanced by 6 Cap-Screws to Resist Recoil Designed for 30mm & 1" Riflescopes